NHTSA Complaint #11620230 — 2021 TOYOTA TACOMA

When stopping vehicle (for instance, at a stop light), vehicle would stop normally when pressing the brakes, but after a few seconds, the vehicle would start forward again. The brake pedal would give way and press down further, stopping briefly before starting forward again - so I had to use the emergency brake or else vehicle would move into oncoming traffic. I consulted a mechanic, and it was diagnosed as a bad brake master cylinder. This vehicle has only 51,000 miles on it, being a 2021 model. The brake pads themselves were checked and they are fine. I replaced the master cylinder and it fixed the issue, but I wouldn't expect this unsafe condition to already be happening to this vehicle, especially this early in life. Toyota must have defective brake master cylinders.